Simple Tmux Wrapper

#!/bin/bash

function usage() {
    echo "tmx <session>"
}

sess=${1:-def}

running_sessions=$(tmux list-sessions | cut -d: -f 1)
found=false

for s in ${running_sessions};
do
    if [[ "${s}" = "${sess}" ]]; then
        found=true
    fi
done

if [[ "${found}" = "true" ]]; then
    exec tmux attach-session -t "${sess}"
else
    exec tmux new-session -s "${sess}"
fi